added alias-to-sieve to this repository

packages/flake-module.nix

@@ -0,0 +1,29 @@
+{inputs, ...}: {
+  perSystem = {
+    pkgs,
+    system,
+    self',
+    ...
+  }: {
+    # We build the alias to sieve tool here, this is a two step process, we first generate
+    # a nix expression with the crate2nix tool from nixpkgs that directly calls rustc
+    # and thus bypasses cargo. We could also generate this file by hand and version it,
+    # but that would need regeneration every time some dependency is updated, so we
+    # opt for build time generation. Afterwards we import and evaluate the generated
+    # nix expression to build the package. For the explicit solution see:
+    # https://nix-community.github.io/crate2nix/00_guides/30_generating/
+    # and for the documentation to this one
+    # https://nix-community.github.io/crate2nix/00_guides/31_auto_generating/
+    # as this module uses idf and forces builds during the evaluation it might
+    # have drastic performance implications, see
+    # https://nix.dev/manual/nix/2.24/language/import-from-derivation
+    packages.alias-to-sieve = let
+      alias-to-sieve-nix = inputs.crate2nix.tools.${system}.generatedCargoNix {
+        name = "alias-to-sieve";
+        src = ./alias-to-sieve;
+      };
+    in
+      (pkgs.callPackage alias-to-sieve-nix {}).rootCrate.build;
+    checks.alias-to-sieve = self'.packages.alias-to-sieve.override {runTests = true;};
+  };
+}